Clabence w



C. W. TAYLOR.

BRAKE MECHANISNI FOR DIFFERENTIALS.

APPLICATION FILED ALIG.I2, I9Ia.

, 6 Patented D30. 16,

Irufem UNITED STATES' EATENT- oEEIoE.

-cLAItENcE W. TAYLOR, or CHICAGO, ILLINoIs, AssIGNoE. To ONLAKE COMPANY, or

onIcnco, ILLINoIsn CORPORATION or ILLINOIS.

Specification of LetterL-Patent.

Patented'Dc..16, 1919.

Application led August 12, 1818. Serial No. 249,898.

i To all 'whom' t may concern.:

Be it known that I, CLARENCE W.. TAY- LOR,. a citizen of the United States of America, residing at Chicago, in the county of Cook and State of Illinois, have' invented certain new and useful Improvements in Brake Mechanism for Dierentials, of which the following is a specification.

This invention relates to improvements in brake mechanism for dierentials, more p sipecially for automobiles, trucks'a-nd the An object of the invention is to provide devices to prevent spinning of either road wheel and yet permit ample diiferentiation, particularly when employed with what is termed the bevel geartype of differentials, in an automobile, vtruck or the like.

This invention is an improvement in connection with the construction disclosed in my pending application filed November 20, 1916, Serial #132,259, and my pending application filed Uctober 10, 1917, Serial 195,675, andv -my pending application erial #221,669, filed March 11, 1918.

With the foregoing and other objects in view, my invention consists in the novel features and in the novel combination'a'nd arrangement of parts hereinafter fully described, illustrated in the accompanying drawings forming a part of this specification, and particularly pointed out in the claims hereunto appendedg-it being understood that changes, variations and modifications in the details ofthe invention within the scope of the claims may be resorted to without departing from or sacrificing any of the advantages thereof.

In' the drawings,

Figure 1 is a longitudinal section ,of the rear axle of an automobile with my improvement incorporated therewith.

Fig. 2 is a perspective vlew of a differential with assembled brake-members detached from the rear axle.

Fig. 3 is a fragmentary sectionon line 3 3 on Fig. 1. y

Similar numerals and letters refer to similar parts throughout the several views. j

Referring to the drawings, the numerals 4 and 4 denote the adjacent endsof the usual divided shaft on which are fixed bevel gears 5 and 6 which have inwardly extending hubs 7 and 8. Positioned between sald bevel gears is what is termed a'spider 9 other suit-able or 'said part is formed with having .radially projecting trunnionsr 10,

ing edges of parts 12 and 13 have formed therein recesses 16 to receive the trunnions 10 In. the usual or other desired manner. The part 12 is provided with an external annular flange 17 which has fixed theretor ring-gear 1 8 by rivets 19 which normally 1s constantly 1n mesh with the drive shaft pin# ion (,not shown).

Preferably the periphery o'f each bevel.

gear 5 and 6 is formed with "an outwardly extending. annular iange 20 which is notched at 21 to receive a projection 22v on one edge of brake-member B, hereinafter further described, for establishing xedrelation between the bevelgear and the'brakemember B.

The separate annularv somewhat tapering brake-members B are alike in construction and a description of one is a description of both. The outer end 23 of Veach said brake-member B is in fixed relation to a bevelgear and the inner end 24 of each said brake-member B is in frictional relation with this power imparting means or rotatable housing A at l1 and with the trunnions 10 which are carried by the housingy A. The brake-members [being ncentricallymounted with their inner ends in parallel relation to other.

An important feature of the present in- -vention is the simple nieans for establishing fixed relation between "each 'of the gears 5 and 6 and the brake-members B, so that friction-al resistance will be afford-ed only between the brake members and the power impartingmeans.

The extent of fri'ctional resistance between the ower impartingmeans and the brake-memgers to oppose the relative rotative movement .of the bevel gears and the brake-membersi that are inIll fixed relation to said bevel gears will depend upon the frictional area the face 14 and the outer 1 surface 15 of the brake-member B together'- `tion to onegear and in frictional relation with the power imparting means is capable of effective work.

In construction,installation and operation, let it be remembered that the inner ends 24C of the brake-members B may be installed so tight between the inner annular face 14 of the parts of the housing A and the outer ends of the pinions 1l as to amount to a solid rear axle action and in effect prevent adequate differentiation even when turning a corner or when one drive wheel encounters an obstruction of considerable proportions on the road surface. Attention is called to this fact because it is preferable that the amount of friction eX- erted at more than suficient to successfully oppose relative rotative movement of the vear on the divided shaft when the vehicle 1s mov- -ing in a straight line or when one of the road wheels is off the road surface temporarily or is on a slippery or soft place and said wheel therefore has lost traction.

The principle of anchoring-by friction means the gears on the inner ends of the divided shaft so as to overcome the driving torque and lyet permit required diferentlation caused by the forces acting at the periphery of the vehicle wheels whenv such lforces are greater than the brake e'ort eX- erted at the dierential, is an important feature of my invention.

I do not lim't my invention to the employment of the annular ange 20 of the gears herein shown as means for establishing fixed relation of a brake-member B with a bevel gear as this fixed relation may be accomplished by other means which will readily occur to skilled mechanics.

In view of the simple character of my invention and the well known'construction of bevel gear type of differential herein shown, itis thought on reference to the drawings and the foregoing description the construction and operation will be readily understood by those skilled in this art.

By thus showing and specifically describing one embodiment of my invention I do not intend to restrict the range of equivalents not made necessary by the prior state of this art.

the differential should not be much Laagste including power imparting means, of two brake members each fixed at one end with one of said gears and both brake-members being in frictional contact at the other ends with the power imparting means.

3. In brake-mechanism for differentials, the combination with gears fixed to the adjacent ends of a divided shaft and pinions in mesh with the gears and power imparting `means in operative relation to the pinions, of two brake-members each fixed at one end to one of said gears and both of said brake-members being in friction'al relation at the other end with said power imparting means.

4. In brake mechanism for differentials, the combination with differential gears fixed to the adjacent ends of a divided shaft, including power imparting means, of two annular brake-members concentrically mounted each brake-member being iXed at one end to one of said gears and both of said brakemembers being in frictional relation at the other ends with said power imparting means.

5. In brake mechanism for differentials, the combination with a divided shaft and gears fixed to the adjacent ends of the divided shaft and power imparting mea-ns, of two brake-members each in fixed relation at one end with one of said bevel gears and both of said brake-members being in frictional relation at the other ends with the power imparting means to oppose lrelative rotative movement of said bevel gears.

6. In brake mechanism for dierentials, the combination with a divided shaft and bevel gears fixed to the adjacentv ends of the divided shaft and power imparting means including radial trunnions carrying rotatably mounted b evel pinions in mesh with both of said bevel gears, of two brake-members each in fixed relation at one end with one of the bevel gears and both of said brake members bein in frictional relation at the other ends with the power imparting means.

In brake mechanism for differentials, the combination with' a divided shaft and bevel gears xed to the adjacent ends of the divided shaft and power imparting means tional relation at their otherends with carrying rotatably mounted bevel pinions in mesh with both of said bevel gears, of two brake-members concentrically mounted and each in fixed relation at one end with one of said bevel gears and both said brakemembers bein in frictional relation at the other ends with said power imparting means and the trunnions carried thereby. I

8. In brake-mechanism for differentials, the combination with differential gears fixed to the adjacent ends' of a divided shaft and a rotatable housing, of two annular brake members each formed at one end for fixed relation to one of said gears, both of said brake-members being formed and disposed at their other ends in frictional relation with the rotatable housing.

9. In brake-mechanism for differentials, the combination of a divided shaft, two gears having peripheral notches fixed to the adjacent ends of the divided shaft, power imparting means including radial trunnions carrying rotatably mounted pinions in mesh with both of sald gears, two brake-members each having projections at one end disposed in said notchesof one of said gears, both of said brake-members being in frigt e power imparting means.

10. In brake mechanism for differentials, the combination of a divided shaft, gears fixed to the adjacent ends of the divided shaft, a rotatable housing having internal annular friction faces and carrymg radial trunnions having rotatably mounted thereonl trunnions each having rotatably mounted thereon a pinion in mesh with said gears, a brake-member for and'in fixed relation at one end with each said4 gears both of said brake members being in frictional relation at the' other ends with said trunnions.

12. In brake-mechanismy for differentials, the combination with a plurality of gears and power imparting means positioned between the gears, of a brake-member in fixed relation at one end with one of said gears and in frictional relation at the other end with the power imparting means.

In testimony whereof I affix my signature.)

CLARENCE W. TAYLOR. 

